Grinding machine



Aug. 14, 1923. 11,464,950)

H.LUTZ

GRINDING MACHINE Filed Oct. 6, 1920 6 Sheets-Sheet 1 ATTORNEY Aug. 114-,1923. 11,464,950

H. LUTZ GRINDING MACHINE 6 Sheets-Sheet 2 HIHHHHH HiiiiflllHH FLT]. II

INVENTOR. BY M Z ATTOR/Vnr Aug.l4,1923.

Filed Oct. 6, 1920 L46495 H.LUTZ

GRINDING MACHINE 6 Sheets-Sheet 3 ATTORNEY Aug. 14, 1923.

H.LUTZ

GRINDING MACHINE Filed Oct. 6, 1920 6 Sheets-Sheet 4 INVENTOR. #6105 A0222.

AYVURNEY.

Aug. 14, 1923. 11,464,956

H. LUTZ GRINDING MACHINE Filed Oct. 6, 1920 6heets-Sheet 5 INVENTOR.

fiams lz. m'g/ I N A TTOR YEV Aug. 14, 1923. 11,464,956)

H. LUTZ GRINDING MACHINE Filed Oct. 6', 1920 6 Sheets-Sheet 6 A T TORNEXareas Aug. re, was.

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Hans turn, or ELMIRA, NEW YORK, assreuon r run wrLLYs-ncoaaow cora-PANY, or ELMIBA, NEW YORK, a oognronarron or cure.

GRINDING MACHINE.

Application filed October 6, 1920. Serial 1%.. 415,127.

To all whom it may concern:

Be it known that I, HANS LUTZ, residlng at Elmira, county of Chemung,btate ot New York, have invented certain new and 6 useful Improvementsin Grinding Machines, of which I declare the following to be a tull,clear, and exact descriptn.

My invention relates to grinding machines and has for its object toprovidea machine of improved constructionfor grinding the discs or ringsor other grinding parts used in the rinding of balls such as areemployed in ball earings.

Another object of the invention is to provide an improved grinding machne adapted to simultaneousl grind a plurality of rings or discs on whichthe grinding surfaces disposed at different angles to the axes of therings Another object of the invention s to provide, in a grindingmachine, a rotating grinding wheel with improved means for holding andreciprocating the work upon the grinding surface of the wheel.

A further object of the invention 18 to provide improved means forsupporting and retating the work in contact with the grinding element. I

With these and other objects in view the invention comprises certainnovel features of construction and arrangement of parts asi will behereinafter more fully pointed out and claimed, it being apparent tothose skilled in the art that the invention shown and describedtherein'is susceptible to var ous modifications and arrangements to su1tspecial or varying conditions, and I WlSl'l it to be understood that theterms which I have used are merely descriptive and not limiting and thatit is my intention to mclude any and all modifications which come withinthe scope of the invention as defined in the appended claims.

A construction constituting one embodiment of the invention isillustrated in the accompanying drawings, in which t Figure I is a sideelevation of a machine embodying the invention.

Figure II is an end elevation of the same, with a portion of the baseomitted.

Figure III is a top plan View of the portion of the machine shown inFigure IV with the grinding disc omitted.

Figure IV is a sectional elevation taken on line lV-IV of Figure II.

Figure V is a sectional elevation taken on lines VV of Figures III andIV.

Figure VI is a detailed sectional view taken on line VI-VI of Figure V,and

Figure VII is a plan view of the frame for supporting the slide showninFigure III.

Like reference numerals refer to similar parts throughout the severalviews of the drawings.

Referring to the drawings, 10 represents a base upon which is mounted astandard 11 having upstanding arms 12 provided with bearmgs 13 adaptedto receive a shaft 14 upon the extremities of which are mounted thegrinding wheels 15, said shaft being provided between the arms 12 withpulle s 16 and 17 of different sizes to permit tlie shaft to be drivenat different rates of speed by means of a belt 18. Cylindrical members19 are mounted upon the base 10 at opposite sides of the standard 11,and secured by means of bolts 20, the connection preferably permittingadjustment of the cylindrical members on the base. The mechanismssuperimposed upon said cylindrical members are similar in constructionand a description of one will therefore suiiice for both. Projectingwithin said cylindrical member 19 is a plunger 22 adapted to support aframe 23, upon which is superimposed the mechanism for supporting androtating the member to be ground in engagement with the grinding wheel15. The plunger 22 is adjustable up and down within the cylinder 19 bymeans of a feed screw 24 rotatable in a head 25 on the upper end of theplunger which is actuated by means of a pinion 26 adapted to be rotatedby a worm 27 on a shaft 28 journaled in bearing 29 and 30 on the frame23, said shaft being actuated by means of a hand wheel 31 rotated by thehandle 32 as shown in Figure VII. The screw 24 is threaded through ablock 33 supported by an upright tubular member 34.- into which thescrew projects, said tubular member being carried by the bottom 35 ofthe cylinder 19 and secured thereon by means of the screws 36 as shownin Figure IV, it being understood that upon rotation of the shaft 23 bymeans of the hand wheel 31 that the plunger 22 will be raised andlowered within the cylinder 19 to move the work into and outofengagement witlrthe grinding wheel 15. The frame 23 is rigidly heldupon the plunger 22 by means of the screws 37 which projects downthrough the central portion of the frame into the plunger. The cylinder19 adjacent the top thereof 1s provided with horizontal and verticalslots 38 and 39 separating the upper portionpf the cylinder into twoparts, each of wh ch is provided with a lu 40 through which extends abolt 41, which when sufiiclently tightened serves to clamp the upperportion of the cylinder upon the plunger 22 to relieve the strain on thefeed screw 24. Beneath the slot 39 the cylinder 19 is provided with alongitudinal slot. 42 through which projects outwardly a stub shaft 43rotatably mounted upon the plunger 22 in any suitable manner, said shaftbeing adapted to move up and down in the slot 42 when the plunger israised and lowered by means of the feed screw 24. Secured upon theshafts 43 are the pulleys 44 and extending from each of said pulleysinwardly are the belts 45 and 46, the former engaging a pulley 47 drivenby a belt 48 and the latter engaging the pulley 49 driven by a belt 50,the pulleys 47 and 49 being rotatably mounted upon the opposite sides ofthe standard 11. The frame 23 is provided with oppositely extending arms51 having half round bearing portions 52 adapted to receive the oppositeends of a pair of rods 53 which are clamped upon said bearing portionsby means of the caps 54 secured by the'bolts 55 as indicated in FigureIII.

Reciprocally mounted upon the rods 53 is a slide having transverseportions 56 and 57 supported respectively by the bearing portions 58 and59 of the slide through which the rods or guides 53 extend. The bearingportions 58 and 59 are split as indicated at 60 and adjacent said splitportions are the downwardly extending lugs 61 through which extendsbolts 62 as shown in Figures I and V. The bolts 62 are pro vided for thepurpose of reducing the size of the bearings as the parts become worn.The transverse portions 56 and 57 of the slide and the bearings 58 and59 are connected by longitudinally extending side portions 63 as shownin Figures III and V. The side portions 63 are bored out to receive thereduced ends 64 of the bearing members 65 in which are positioned thebushings 66 to receive the opposite ends of the drive shaft 67, one endof which is provided with a sprocket 68 over which extends the upper endof a sprocket chain 69, the lower end of which extends over a sprocket70 on the shaft 43 journaled in the lower end of the plunger 22 andcarrying the pulley 44 which is driven by the belt 45 as previouslydescribed. Secured upon the shaft 67 is a worm 71 meshing with the wormgear 72 having a hub-like portion 73 rotatably mounted in the bearing 74formed centrally upon the transverse portion 57 of the slide as shown inFigures III and IV. The worm gear 72 is held in position upon thebearing 7 4 by means of the screw bolts 75 extending downwardly throughthe cover plate 76 and into the hub-like portion '73 of the gear, saidcover plate being rotatable upon a wearing plate 77 on the top of thebearing (4.

A cam 78 is positioned beneath the worm gear 72 and provided with anupstandingportion 79 extending through the center of the hub 73 of thegear and connected with said cover plate 76 by means of a screw bolt 80,which serves to clamp the cam upon the gear and to cause it to rotatetherewith. The cam is adapted to rotate between two rollers 81 and 82mounted on the upper ends of the bolts 83 and 84 respectively, thelatter being adjustable in a slot 85 in the frame member 23 and theformer screwed into the frame member as shown in Figure IV. The rollersare held upon the enlarged ends of the bolts by means of set screws 86projecting into grooves 87 cut in the heads of the bolts. A bar 88 isclamped upon the frame 23 by means of the bolts 83 and 84 andsuperimposed upon the bar are the washers 89 upon which the rollers 81and 83 are mounted to rotate. The washers may be of any desiredthickness to vary the height of the rollers. The bar 88 is provided atits outer end with a slot 90 registering with the slot 85 in the framemember 23 to permit the bolt 84 and roller 82 to be adjusted inwardly oroutwardly to accommodate cams of different sizes, when it is desired tovary the length of stroke of the reciprocally mounted slide upon therods '53. Mounted to rotate or swing upon the bearings 65 for supportingthe shaft 67 is a work supporting yoke or member 91, the extremities 92of which encircle the bearings, the latter being clamped upon saidextremities by means of the bolts 93 which serve to cause the annularflange therein to grip said extremities for the purpose of holding theyoke in any desired position of adjustment suitable to bring the work inengagement with the grinding wheel. The central portion of the yoke isprovided with a bearing portion 94 in which is mounted a bushing 95 forreceiving the shaft 96, the lower end of which is reduced to receive apinion 97 adapted to mesh with the worm 71 on the shaft 67 as shown inFigure IV. The upper end of the shaft 96 is also reduced as indicated at97 to receive the hub-like portion 98 of the grinding disc 99, thegrinding surface 100 of which is brought into contact with the grindingwheel 15 as indicated in Figure I, said surface being ground to anydesired angle with respect. to the axis of the disc. A

reeaeeo washer 101 is disposed between the bearing portion 94 of theyoke and the hub-like portion 98 of the grinding disc, the latter beingclamped and firmly held into position by the nut 102 on the outer end ofthe reduced por tion 103 of the shaft 90', which is driven by theshaft67 through the worm 71 and worm gear 97. The grinding surface 104 of thegrinding disc 105 is ground in a similar manner to the disc 99, the disc105 being provided with a hub-like portion 106 carried by the reducedportion 97 of shaft 96 and held thereon by the clamping nut 102 as shownin Figure I. The construction of these parts is thesame as thecorresponding parts shown inFigure IV, with the excelption of slightdifferences in proportion. s previously stated, the swinging or pivotedyoke 91 for supporting the grinding disc or Work piece in engagementwith the grinding wheel is adjustable in a vertical plane, the extent ofthe ad'ustment being indlcated by dotted lines in igure. VI.

During the operation of the machine the grinding discs 99 also 105 arereciprocated back and forth upon the grinding wheels 15, which providesfor even wear of the wheels, whereby the wearing of grooves ordepressions therein is prevented, it being understood that thereciprocation of the slide, upon which the grinding discs are mounted iseffected by means of the rotation of the cam 78 by means of the gear 72and worm 71 on the shaft 67 driven by the sprocket chain 69 which moveswith the slide as the latter is reciprocated.

While I have illustrated and described one embodiment of my invention,it will be obvious to those skilled in the art that modificationsthereof may be constructed without departing from the spirit of theinvention and I wish therefore not to be restricted or limited to theprecise embodiment shown except in so far as the same is limited by theappended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a grinding machine, a base, a grind in wheel rotatably mountedupon the base, a s ide reciprocally mounted upon said base, a shaftrotatably mounted upon the slide, a gear driven by said shaft, a camdriven from said gear and adapted to reciprocate the slide upon the baseand a work holder carried by the slide and driven from said gear torotate the work in contact with said grinding wheel.

2. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a shaftrotatably mounted upon the slide, a worm upon said shaft, a gearconnected with said worm, a cam driven by said gear and adapted toreciprocate the slide upon the base, anda work supporting shaftrotatably mounted upon the slide to be driven by said worm whereby thework is rotated in contact with said grinding wheel.

3. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a shaftrotatably mounted-upon the slide, a worm carried by said shaft, 'a geardriven by said worm, a cam operated by said gear to reciprocate-theslide upon the base and a rotatable work supporting member connected tobe driven by said worm to rotate the work in contact with said grindingwheel.

4:- In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a shaftrotatably mounted upon the slide, a

worm carried by said shaft, a gear connected with said worm,a camactuated by said gear to reciprocate the slide upon the base, ardtatable shaft mounted upon the slide and adapted to support the workin contact with said grinding wheel and a gear connected with saidsecond shaft and meshing with said worm to effect rotation of the work.

5. In a,grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a shaftrotatably mounted upon the slide, a gear adapted to be driven by saidshaft, a cam rotated by said gear, a pair of rollers mounted upon thebase between which the cam is adapted to rotate to reciprocate saidslide, and a rotatable work holder actuated by said shaft for effectingrotation of the work in contact with said grinding wheel.

6. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a bearingcarried by said slide,ashaft rotatably mounted upon said bearing, a workholder mounted to swing upon said bearing and adapted to support thework in engagement with said grinding wheel, a gear adapted to be drivenby said shaft and a cam'actuated by said gear and adapted to reciprocatethe slide upon the base.

7. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a bearingmember carried by the slide, a shaft rotatably mounted upon said bearingmember, an arm pivotally mounted upon the bearing member, a Work holdingshaft rotatably mounted upon the arm and adapted to be driven by thefirst mentioned shaft to rotate the work in engagement with the saidgrinding wheel and means actuated by the first mentioned shaft forreciprocating the slide.

8. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base,

aslide reciprocally mounted upon the base, a

bearing member mounted upon the slide, a

ill

shaft journaled upon said bearing member, an arm pivotally mounted uponsaid bearing member, a work holding member rotatably mounted upon saidarm and adapted to rotate the work in engagement with the said grindingwheel, means driven by said shaftto effect rotation of said work holdingmember and means actuated by said shaft for reciprocating the slide onthe base.

9. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a bearingmember upon the slide, a shaft rotatably mounted upon the bearing membera holder pivotally mounted upon said bearing member, a shaft rotatablymounted upon the holder and co-operating therewith to support the workin engagement with said grinding wheel, means causing the secondmentioned shaft to be driven by the first mentioned shaft and meansactuated by the first mentioned shaft adapted to reciprocate the slideupon the base.

10. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a bearingmember carried by the slide, a

. shaft rotatably mounted upon said bearing member, a member pivotallymounted upon said bearing member, a work holding shaft rotatably mountedupon said pivoted member and driven by the first mentioned shaft torotate the work in engagement with the grinding wheel, and meansactuated by the first mentioned shaft adapted to reciprocate the slideupon the base.

11. In a grinding machine, a. base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a bearingmember carried by the slide, a shaft rotatably mounted upon said bearingmember, a member pivotally mounted upon said bearing member, a workholding shaft rotatably mounted upon said pivotally mounted member andadapted to rotate the work in engagement with said grinding wheel, agear driven by the first mentioned shaft adapted to drive the secondmentioned shaft and a cam actuated by the said gear and adapted toreciprocate the slide upon the base.

12. In a grinding machine, a base, a grind ing wheel rotatably mountedupon the base, a plunger adjustable vertically upon the base, a framecarried by said plunger, guides carried by said frame, a slidereciprocally mounted upon said guides, a cam 'ournaled upon said slide,driving means a apted to rotate said cam, means actuated by said cam adated to reciprocate the slide 11 on said gui es and a work supportingmeni er actuated by said driving means adapted to rotate the work inengagement with said grinding wheel.

13. In a grinding machine, a base, a grind- 1,4e4,95o Y a plungeradjustable vertical y upon the base, a reoiprocall mounted slide carriedby said plunger, a s aft journaled upon said slide, a worm upon saidshaft, a gear adapted to be driven by the worm, a cam actuated by saidgear and adapted to reci rocate'the slide, a second ear adapted todriven bysaid worm, a s aft driven by the last mentioned gear and meansadapted to clamp a work piece upon the last mentioned shaft in positionto be engaged by said grinding wheel.

14. In a grinding machine, a base, a grind. ing wheel rotatably mountedupon the base, a'slide reciprocally mounted upon the base, a shaftrotatably mounted upon the slide, a worm carried by said shaft, a gearjournaled upon the slide and adapted to mesh with said worm, a camdriven by said gear adapted to reciprocate the slide and a pivotallymounted shaft operatively connected with said worm and adapted to rotatea work piece in engagement with said grinding wheel.

15. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a bearingupon the slide, a shaft journaled upon the slide, a worm upon the shaft,a gear meshing with said worm, a rotatable member upon said bearing, acam having a portion projecting through said gear and connected withsaid rotatable member, means upon said base engaging the cam to causethe latter to effect reciprocation of the said slide and a work holderdriven by said shaft adapted to rotate a work piece in engagement withthe said grinding wheel.

16. In a grinding machine, a base, a grinding wheel rotatably mountedupon the base, a slide reciprocally mounted upon the base, a shaftjourn'aled upon the slide, a worm carried by said shaft, a bearingformed upon the slide, a gear journaled upon the bearing and meshlngwith said worm, a member rotatably mounted upon said bearing, a camhaving a portion projecting through said gear and connected with saidrotatable member, means actuated by the cam adapted to effectreciprocation of said slide, a gear driven by said worm, a member drivenby said last mentioned gear, and

means for clamping a work piece upon said a ing wheel rotatably mountedu on the base, i

and a rotatable work holding support carried by said member and adaptedto be actuated by said shaft to rotate the Work in engagement with saidgrinding wheel.

18. In a grinding machine, a base having guides, a Work carrying slidemounted on said guides, a shaft journaled in said slide and extending atright angles to said guides, a cam carried by said slide and connectedto be driven from said shaft, and means on said base adapted to engagesaid cam to move'said slide when said shaft is rotated.

19. In a grinding machine, a base having guides, a slide carrying aWork-holder mounted on said guides, a shaft journaled in said slide andextending transversely of said guides, a cam carried by said slide andgeared to said shaft, a roller carried by said base to engage sald cam,and means for rotating said work-holder.

' 20. Ina grinding machine, a base having guides, a slide mounted onsaid guides, a Work-holder rotatably mounted on said slide, a drivinggear therefor, a cam rotatively mounted on said slide, a driving gearfor said cam, a pair of rollers carried by said base on opposite sidesof said cam, and a single gear on said shaft engaging both said gears,whereby rotation of said shaft simultaneously rotates and reciprocatessaid Work-holder.

lln testimony whereof, I affix my signature.

HANS LUTZ.

